package com.demo.sell.utils;

import java.util.Random;

public class KeyUtil {

    /**
     * 生成唯一的主键
     * 格式：时间+随机数
     * @return
     */
    public static synchronized  String genUniqueKey(){
        Random random = new Random();
        Integer number =  random.nextInt(900000) + 100000;

        return   System.currentTimeMillis() + String.valueOf(number);

    }
}
